997206323191domain: NAppears in sequencesa(n) = (n+3)*a(n-1) + a(n-2), with a(0)=0, a(1)=1.at n=13A058309a(n) = 2*(K(n,2)*I(4,2) - (-1)^n*I(n,2)*K(4,2)) where I(n,x) and K(n,x) are Bessel functions.at n=17A246662